Coke oven door



J. N. MCCLURE COKE OVEN DOOR Dec. 20, 1960 2 Sheets-Sheet 1 Filed Aug.27, 1957 INVENTOR.

J/M/FS 1V. McCZMQE MX/M ATTORNEY Dec. 20, 1960 J. N. MOCLURE COKE OVENDOOR 2 Sheets-Sheet 2 Filed Aug. 27, 1957 MA A United States Patent COKEOVEN DOOR James N. McClure, Elizabeth, Pa., assignor to United StatesSteel Corporation, a corporation of New Jersey Filed Aug. 27, 1957, Ser.No. 680,545

2 Claims. (Cl. 202-248) This invention relates to a coke oven door andmore particularly to a self-sealing door. Such doors are provided with asteel sealing ring having a knife edge which bears upon the smooth faceof the door jamb. These sealing rings are normally made of carbon steeland have a very short life, particularly in a rigid door. In flexibletype doors such as shown in the patents to Wilputte No. 2,131,829,Freeman No. 2,236,092 and Wilputte No. 2,238,239, the problem is not asserious since the sealing ring is free to flex about rigid plungers.Since the sealing ring is subjected to considerable heat when the dooris in place it is desirable to make the sealing ring of stainless steelor other high temperature resistant alloy. However, it was found thatwhen using alloy rings they became warped and deformed in a relativelyshort time and had to be removed for repair.

It is therefore an object of my invention to provide a self-sealing cokeoven door of the rigid type wherein the sealing ring has a long life andrequires very little maintenance.

This and other objects will be more apparent after referring to thefollowing specification and attached drawings, in which:

Figure l is a front elevation of a coke oven door in place on a cokeoven; and

Figure 2 is a view taken on the line IIII of Figure 1.

Referring more particularly to the drawings, the reference numeral 2indicates the walls of a coke oven chamber 4. A pair of buckstays 6 arearranged one on each side of the chamber 4 and a door jamb 8 is fastenedthereto in any suitable manner. The door jamb 8 has spaced verticalwalls 10. A pair of latch hooks 12 are fastened to each of the verticalwalls 10 in any suitable manner such as by means of rivets (not shown).Each of the latch hooks 12 has an elongated vertical slot 14 therein onthe portion thereof extending beyond the wall 10. The door jamb 8 has asealing surface 16 around its periphery. A rigid door frame is adaptedto be received between the vertical walls 10. A liner retainer 20 isbolted or otherwise attached to the inner end of the door frames is andsupports a refractory liner 22 which extends into the chamber 4. A pairof latch brackets 24 are fastened to the outer side of the door frame L8in any suitable manner such as by means of screws and nuts 26. Each ofthe brackets 24 has a threaded opening 28 therein for receiving a screw30. A latch bar 32 is secured to the screw 30 so tnat it can rotate withrespect to the screw but cannot move axially with respect thereto. Aplurality of openings 34 are arranged around the periphery of the doortrame 18. A plunger 36 extends tom the inner end of the frame 18 towardthe surface 16. The outer end of each of the openings 34 is closed bymeans of a threaded plug 35. A spring 40 extends from each of tne plugs50 to the outer end of plunger 36. the structure so tar described isconventional and it will be understood that gaskets, packing and thelike will be provided where necessary.

Other parts not specifically described correspond to parts 'ice shown inthe above mentioned patents and will function in essentially the samemanner as in the patents. A sealing ring or diaphragm 42 is attached tothe periphery of the door frame 18 adjacent the plungers 36. The ring 42is U-shaped and has an inwardly extending flange 44 on its inner leg.The outer leg of the ring 42 is attached to the door frame 18 by meansof spaced screws 46 having nuts 48 thereon which bear against bars 50.The sealing ring 42 is preferably made of stainless steel. An impactstrip 52 is arranged between the ring 42 and the plungers 36. The impactstrip 52 may be unitary or consist of four pieces, 52A, 52B, 52C and52D, as shown, one for each side of the door, one for the top of thedoor and one for the bottom of the door. The impact strip 52 ispreferably in the form of a channel with its legs extending outwardly toreceive the ends of the plungers 36.

The operation of my device is as follows:

The door is positioned at the end of a coking chamber by door handlingdevices in the usual manner. When handling the door in this manner thesprings 40 hold the plungers 36 against the impact strip 52 which inturn is held between the sealing ring 42 and the plungers 36 by pressureof the springs 40. The latch bars 32 are then rotated to a horizontalposition with their ends being received in the slots 14 of the latchhooks 12. The screws 30 are then rotated so that the door frame 18 isforced toward coking chamber 4 causing the flange 44 of sealing ring 42to contact the surface 16 of the door jamb 8. Continued rotation of thescrews 30 causes the plungers 36 to compress the springs 40 therebyassuring constant and uniform pressure on the sealing ring 42 throughthe impact strip 52. I have found that use of the impact strip in thismanner prevents or limits deformation of the sealing ring 42.

While one embodiment of my invention has been shown and described itwill be apparent that other adaptations and modifications may be madewithout departing from the scope of the following claims.

I claim:

1. A coke oven door assembly comprising a door jamb having a sealingsurface around its periphery, a rigid door frame, means for supportingsaid door adjacent said jamb, a high temperature resistant sealing ringcarried by said door frame, said sealing ring including a portion spacedfrom said door frame and generally parallel to said sealing surface anda flange on the free end of said portion extending inwardly to contactsaid sealing surface, a plurality of spaced apart plungers carried bysaid door frame around its periphery, an elongated impact strip separatefrom and movable in respect to said sealing ring and adapted to bearagainst the side of said sealing ring opposite said sealing surface,said impact strip extending substantially around the periphery of saidsealing ring, and means for urging said plungers against said impactstrip.

2. A coke oven door assembly comprising a door jamb having a sealingsurface around its periphery, a rigid door frame, means for supportingsaid door frame adjacent said jamb, a U-shaped stainless steel sealingring, means for fastening one leg of said ring to said door frame, theother leg of said U-shaped ring being movable with respect to said oneleg, a flange on the free end of said other leg extending inwardly tocontact said sealing surface, a plurality of spaced apart plungerscarried by said door frame around its periphery, an elongated channelshaped impact strip separate from and movable in respect to said sealingring and adapted to bear against the side of the said other leg of saidsealing ring opposite said flange, said impact strip extendingsubstantially around the periphery of said sealing ring and having itslegs extending outwardly to receive the 3 ends of said plungers, and aspring for urging each of said plungers against said impact strip.

, References Cited in the file of this patent- UNITED STATES PATENTS 4Wilputte Oct. 4, 1938 Freeman Mar. 25, 1941 Otto July 8 1941 Van AckerenAug. 9, 1949 Doll Feb. 5, 1957 Holman July 23, 1957

1. A COKE OVEN DOOR ASSEMBLY COMPRISING A DOOR JAMB HAVING A SEALING SURFACE AROUND ITS PERIPHERY, A RIGID DOOR FRAME, MEANS FOR SUPPORTING SAID DOOR ADJACENT SAID JAMB, A HIGH TEMPERATURE RESISTANT SEALING RING CARRIED BY SAID DOOR FRAME, SAID SEALING RING INCLUDING A PORTION SPACED FROM SAID DOOR FRAME AND GENERALLY PARALLEL TO SAID SEALING SURFACE AND A FLANGE ON THE FREE END OF SAID PORTION EXTENDING INWARDLY TO CONTACT SAID SEALING SURFACE, 